-8.15% is the change from 957 to 879
Calculation steps:
[( 879 - 957 ) ÷ 957] x 100 = -8.15%
Formula
Percentage change = [(879 - 957) / 957] x 100
Subtract the new number by the original number
879 - 957 = -78
-78 ÷ 957 = -0.08150470219435736
-0.08150470219435736 x 100 = -8.15%